. >> as president obama begins his second term, what is the most important issue? >> if you are in grades 6 through 12, make a video about your message to the president. is your chance to win $5,000. the deadline is january 18. for more information go to studentcam.org. >> next a discussion on climate science, politics, and global warming. from the commonwealth club of california, this is about one hour. [applause] >> thank you for coming. we are delighted to be here. welcome. seven years ago, there was a consensus in washington that the earth's atmosphere could be altered. it is a different story. over the next hour, we will discuss opinion, with james hansen and our live audience here at the in san francisco. today, dr. hansen is receiving the 2012 stephen schneider award for outstanding climate science climate one. stephen schneider was a who was involved in the formation of climate one that[applause] sandy. new york? to place it in a modern context, we have to turn to proxy data like coral and ice to piece together the puzzle of how the climate buried in the di